Study on the effect of sodium-nanoparticle in rice root development

Area of Science:

• Plant Physiology
• Nanotoxicology
• Crop Science

Background:

• Micro- and nanoparticles enter plant root tissues, but their physiological effects are not well understood.
• Understanding nanoparticle interactions with crops is crucial for agricultural sustainability and safety.

Purpose of the Study:

• To investigate the physiological effects of sodium tetrafluoroborate (NaBiF4) and bismuth trifluoride (BiF3) nanoparticles on rice seedlings.
• To analyze the impact of these nanoparticles on root development, enzyme activity, ion concentration, and stress-related gene expression in rice.

Main Methods:

• Rice seedlings were treated with 100 µM NaBiF4 and BiF3.
• Evaluated root elongation, adventitious root formation, peroxidase activity (SOD, CAT, POD), and elemental concentrations (Na, K).
• Analyzed the expression of stress-related genes (OsMT1, OsMT2, OsOVP1, OsNIP2;1, OsMT2b) using quantitative real-time PCR (qRT-PCR).

Main Results:

• NaBiF4 inhibited root elongation and promoted adventitious roots, while BiF3 showed no significant phenotypic changes.
• NaBiF4 altered enzyme activities (decreased SOD/CAT, increased POD) and reduced potassium content.
• NaBiF4 differentially affected gene expression (decreased OsMT2/OsOVP1/OsNIP2;1, increased OsMT2b), whereas BiF3 only increased OsMT1 expression.

Conclusions:

• NaBiF4 nanoparticles exert significant physiological effects on rice, impacting root morphology, enzyme activity, ion homeostasis, and stress gene expression.
• BiF3 nanoparticles have a less pronounced effect on rice physiology compared to NaBiF4.
• These findings provide a physiological basis for understanding the differential impacts of sodium salt-nanoparticles in crop plants.